I enabled Full friendly URLs option on Xenforo , Giving errors How to solve ?

[ShieldX]

using xenforo 2.2.16 , i was not receving any errors , then i enable friendlly urls , after 30 min later i started receiving this i don't get what is the actaully cause.

 

[ShieldX]

and once i disable the friendly urls , my forum start working , i want to hide that index.php shit

 

[ShieldX]

Problem as been solved , it was saving the code in htaccess.txt not in .htaccess that why rules were not working.